Increase priority of docker strategy to be above podman

Author: SoMuchForSubtlety

core/src/main/java/org/testcontainers/dockerclient/RootlessDockerClientProviderStrategy.java

@@ -22,7 +22,7 @@
 @Slf4j
 public final class RootlessDockerClientProviderStrategy extends DockerClientProviderStrategy {
 
-    public static final int PRIORITY = UnixSocketClientProviderStrategy.PRIORITY + 1;
+    public static final int PRIORITY = UnixSocketClientProviderStrategy.PRIORITY + 2;
 
     @Getter(lazy = true)
     @Nullable